When I was a kid, I sometimes wished I were a boy, but mainly because the boys around me generally did things that were more fun, and didn't seem to be held to the same standards of appearance and manner. By the time I was a teenager, though, I realized I didn't have to follow those standards, and I could do pretty much whatever I put my mind to. Since then, I haven't really cared.
So, I am a straight female, but mostly I think of myself simply as me. I identify as female primarily for medical and physiological matters; for deciding which restroom or locker room to use; and for filling out forms that ask for gender. In general, though, I identify much more strongly with my profession, talents, abilities, interests, spirituality, culture, and personality than with gender.
I wear almost exclusively women's clothing because it fits my figure best. I don't mind the occasional dress or skirt in the right style and colors, but find much of women's clothing hopelessly impractical, uncomfortable, gaudy, or flimsy. I tend therefore to wear fairly androgynous styles, but tailored for women. I wasn't really a tomboy, but still hated girly things as a kid. I think I liked dresses much better when I could buy the ones I liked rather than the silly things my mother had for me when I was very small.
I was lucky in a way as a kid, especially in my generation. I was an only child, so my mother did typical girl things with me like cooking, sewing, shopping, visiting; my father did typical boy things, like home repairs, woodworking, fishing, etc. (He wasn't into sports or cars himself.) I've followed suit into adulthood, doing what is interesting or needful regardless of which box it is usually assigned. I cook and build computers; sew clothes and cut wood; garden and do martial arts; have science as a vocation and music as an avocation.